code: def _add_dense_feature_schema(self, name, spec, schema):
      schema["fields"].append(
          {
              "name": name,
              "type": self._add_dense_feature_type(
                  spec.dtype, len(spec.shape.as_list())
              ),
          }
      )
  
imports: import os
  import hashlib
  import json
  import numpy
  import tensorflow
  from avro.schema import Parse
  from avro.datafile import DataFileWriter
  from avro.io import DatumWriter
  from tests.test_atds_avro.utils.file_writer import FileWriter
  from tests.test_atds_avro.utils.generator.varlen_tensor_generator import VarLenTensorGeneratorBase
  from tensorflow_io.python.experimental.atds.features import DenseFeature, SparseFeature, VarlenFeature
label_desc: Use image node_id 9 for calling the ATDSWriter obj's underlying member method code with example usage: obj._add_dense_feature_schema(name, spec, schema) without return types